I read it as him saying there's tremendous division in the country over Trump - which is indisputable - but it's really over deeper issues and Trump's just the outlet.
The division in this country is the MSM vitriol, hatred and rage for Trump the media is 1000% responsible for the division in the country!! Trump has done NOTHING to create this division NOTHING!! Obama was FAR MORE divisive!!
That distorts what Trump is about and has achieved.
Never mind McMaster being mendacious about Republicans and Democrats being “at each other’s throats” when they cooperated from 2017 to 2019 to stymie Trump’s promises.